extern const char ach_turn[2];
extern const unsigned char aifile[ nsquare ];
extern const unsigned char airank[ nsquare ];
+extern int move_list[], move_ptr; // [HGM] undo: game history (used in proce.c and makemove.c)
#if defined(DFPN_CLIENT)
# define DFPN_CLIENT_SIZE_SIGNATURE 64